Reaming-tool.



. N0. 687,296. Patented NOV. 26, IQOL J. 8. BROWN. BEAMING TOOL. (Application med Apr. 25, 1901.

I (No Model.)

II Hiilli llllllllllll v \\\\\\\\\\\\\\\\s$\\\\\\\\\\\\\\\ \\\\\\\R 1, gggg mi UNITED STATES PATENT OFFICE.

JACOB s. BROWN, OF LOS ANGELES, OALIFORNlA, ASSIGNOR on ONE-HALF -TO FRIEDRICH EICHENHOFER, OF Los ANGELES, CALIFORNIA,-

REAMlNG-TOOL.

SPECIFIGATIQN forming part of Letters Patent No. 687,296, dated November 26, 1901.

Application filed April 25, 1901.

To all whom it may concerm Be it known that I, JACOB S. BROWN, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Beaming-Tool, of which the following is a specification.

This invention relates .to a reaming-tool for use with a string of well-drilling tools in forming oil or otherwells; and the object of the same is to provide an automatically-operatin g attachment that will contract to pass through a casing-section and when liberated from the lower ends of the latter expand to drill or cut a hole ahead of the said lower end of the casing large enough to let the casing follow.

The invention consists in the construction and arrangement of the several parts, which will be more fully hereinafter described and claimed.

In the drawings, Figure 1 is a transverse vertical section through a portion of a wellcasing, showing the improved device in elevation passing therethrough in contracted condition. Fig. 2 is a similar view showing the improved device as having reached the end of the casing and far enough projected therefrom to permit the reaming members to expand. Fig. 3 is a transverse section on the line 2 2, Fig. 2. Fig. 4 is a cross-sectionon the line 4: 1, Fig. 2.

Similar numerals of reference are employed to indicate corresponding parts in the several Views.

The numeral 1 designates a stock of suitable dimensions, having an upper reduced screw-threaded attaching end and a longitudinal spring-chamber 2, which is closed by a slide 3, having an angular end 4 extending into said chamber to receive the impact of the upper extremity of a spring 5, located in said chamber, said spring having its lower extremity bearing against the lower end wall of the chamber. The lower end of the slide is formed with lateral catch projections 6, and said slide has longitudinal movement over a central depending partition-bar 7,forming an integral portion of the stock. The lower portion of the stock is formed with recesses 8 on opposite sides of the bar 7 to pro- Serial 110.57.427. (No model.)

'vide depending vertical extensions 9 with shoulders 10 at their lower terminals. In the recesses 8 expanding jaws or reamers 11 are mounted and have 'upperreduced shanks 12, 5 5 located and having longitudinal movement in the vertical extensions 9 of the recesses, and provided with inwardly-projecting shouldered heads 13 to engage the catch projections 6 of the slide. The inner edges of the shanks 6o .12 where they run into the main body portions of the reamers have downward and outward inclines or beveled portions 14 to cause them to fit close against the opposite side edges of the bar 7 when theireamers are clos'edjin, as shown by Fig. 1, and thejupper portions of the bodies of the reamers have angular shoulders 15 to contact with the shoulder-s10 to limit the expanding movement of the reamers when the latter are free to flyout into workmg position. The outer edges of the reamers immediately below the shoulders 15 thereof have outward and. downward inclines 16 to contact with the well casingor tube through which they pass, and thereby have the minimum transverse extent of the reamers when. in closed position'equal-to' the transverse or cross extent of the stock, whereby the reamers will be caused to freely slide through the casing or tube. To aid in this minimum contraction of the reamers, the inner portions thereof below theinclines or beveled portions 14 are formed with recesses 17, having lower downwardly and inwardly inclined walls 18 at an angle to inner vertical bearing-faces 19, extending to the lower terminals of the reamers. The lower extremity of the bar 7 is formed with a head 20, having opposite 'side straight edges 21, against which the-faces 19 have bearing to hold the reamers firmly out go in reaming position,as shown by Fig. 2. When the reamers are contracted to pass throughv a casing or tube, the recesses 17 receive the head 20 and the lower inclined walls 18' are below the lower end of and partially in con- 5 tact with the said head,so that the reamerswill easily-clear the head without sticking when ward movement of the said socket and slide. The spring and slide, as well as the upper shank portions of the reamers, are normally covered and made accessible by the use of a cover-plate 24, removably attached to the stock, as shown by Fig. 3, said plate being removed in Figs. 1 and 2 to give full view to the parts. The lowerends of the reamers are provided with suitable reaming-bits 25, which flare outwardly, as shown.

It will be seen that the bar 7 centrally depends from the stock and that the reamingtools are carried by the slide 3 and movable in close relation to the said bar. Hence the bar from its construction operates to spread the reaming-tools when the slide is moved upwardly into the stock and holds the said reaming-tools in positively-expanded working positions, as clearly shown by Fig. 2.

From the foregoing description the operation and advantages of the improved-device will be obvious, and by theme of the same in proper position in connection with drilling-tools the application and reliable positioning of the tubes or casings will be facilitated. The improved device is also strong and durable and comparatively inexpensive in the cost of construction. The shanks of the reamers may be readily detached from the'slide at any time desired for the purpose of repair or replacement without removing pivots or other fastening devices.

Having. thus described theinventiomwhat is claimed as new is l. In a reaming attachment of the class set forth, the combination of a stock having: a bar centrally projecting from the lower end thereof and recesses on opposite sides'of said bar, an automatically-operating slide'mounted in the center of the stock and movable over a portion of the said bar, and reamingtools loosely and freely detachably held at their upper ends in the upper portions of the recesses on opposite sides of the bar and com nected to the lower end of the slide.

2. In a reaming attachment of the class set forth, the combination of a stock having a bar projecting from the lower end thereof and recesses adjacent to said bar, the latter havingalowerenlarged end or head, a springactuated slide movable longitudinally of the stock and having the lower portion thereof engaging the said bar, the recesses of the stock providing opposite shoulders, and reamers loosely and detachably connected to the slide and having portions to engage the said shoulders and the lower enlarged end or head of the bar.

3. In a reaming attachment of the classset forth, the combination of a stock having recesses and shoulders at the lower portion thereof, a bar depending centrally from said stockand provided with a lower enlarged end with straight side edge portions, a spring-actuated slide mounted in the stock and engaging the said bar, and reamers having shanks loosely and readily and detachably engaging the said slide and provided with inner edge recesses, inclines and straight bearing portions, and outer shoulders and inclines, the portions of the reamers connected to the slide beingin the form of shanks reduced in crosssection, the side edge portions of the lower enlarged end of the bar being adapted to engage the straight bearing portions of the reamers and the recesses of the latter having inclined walls fitting over and inclosing the enlarged end of the bar when said reamers are contracted.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

JACOB S. BROWN.

Witnesses:

W. EDGAR MILLER, CHAS. H. Tom. 

